US5613587A - Transfer case friction plate synchronizer - Google Patents
Transfer case friction plate synchronizer Download PDFInfo
- Publication number
- US5613587A US5613587A US08/400,708 US40070895A US5613587A US 5613587 A US5613587 A US 5613587A US 40070895 A US40070895 A US 40070895A US 5613587 A US5613587 A US 5613587A
- Authority
- US
- United States
- Prior art keywords
- friction plate
- shift sleeve
- transfer case
- drive shaft
- drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/02—Arrangements for synchronisation, also for power-operated clutches
- F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/344—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having a transfer gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/08—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/02—Arrangements for synchronisation, also for power-operated clutches
- F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
- F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
- F16D2023/0643—Synchro friction clutches with flat plates, discs or lamellae
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19023—Plural power paths to and/or from gearing
- Y10T74/19074—Single drive plural driven
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19023—Plural power paths to and/or from gearing
- Y10T74/19074—Single drive plural driven
- Y10T74/19079—Parallel
- Y10T74/19102—Belt or chain
Definitions
- the present invention relates generally to a friction plate synchronizer for use in a drivetrain subassembly, and more particularly to a preloaded friction plate synchronizer for use in a four-wheel drive torque transfer case.
- a transfer case capable of transferring torque from the input shaft thereof to both a front and rear output shaft to provide four-wheel drive.
- One particular design utilizes a drive sprocket rotatably mounted about the drive shaft and connected by a chain to a second sprocket coupled to rotate with the front output shaft.
- the drive shaft rotates without transferring torque to the drive sprockets.
- the drive sprocket mounted about the drive shaft is coupled to the drive shaft to receive torque therefrom and transfer the torque through the drive chain to the front output shaft.
- One method of selectively coupling the drive shaft to the drive sprocket is to provide a four-wheel drive clutch.
- the four-wheel drive clutch must be relatively large to be capable of transferring sufficient torque to drive the front wheels of the vehicle.
- the presence of a four-wheel drive clutch limits the ability of designers to reduce the size and weight of transfer cases.
- Transfer cases may also be designed to provide a choice among a high speed range, a low speed range, or a neutral range.
- range shift operations are ordinarily performed when the motor vehicle transmission is in neutral, if the vehicle has an automatic transmission, the transmission may continue to transmit torque to the input shaft of the transfer case for a brief time because of a phenomenon known as torque converter drag.
- torque converter drag a phenomenon known as torque converter drag.
- range shift operations such as when the vehicle driver shifts the transfer case from low or neutral into the high speed range or into the low speed range from the high speed range, the stationary components associated with the intermediate drive shaft of the transfer case must be coupled with the rotating torque input shaft or components connected thereto.
- the torque converter drag causes a difference in rotational speed between the input shaft and the non-rotating intermediate drive shaft during coupling operations and evidences itself as ratcheting between the gears or clunking which results in noise, vibration, and wear on the shafts and gears.
- the present invention is therefore directed to a friction plate synchronizer for use in a drivetrain subassembly such as a torque transfer case to facilitate the synchronous coupling of a first rotatable member to a second rotatable member
- the friction plate synchronizer comprising a first friction plate set including at least one first friction plate secured for rotation with the first rotatable member and a second friction plate set including at least one second friction plate maintained in frictional engagement with the first friction plate set by at least one spring, wherein the second friction plate set is selectively engageable with the second rotatable member such that upon engagement of the second rotatable member and the second friction plate set, the first friction plate set and the second friction plate set cooperate to facilitate the synchronous coupling of the first and second rotatable members.
- the friction plate synchronizer provides the advantage of facilitating the smooth engagement of components of a drivetrain subassembly.
- FIG. 1 is a cross-sectional view illustrating a torque transfer case incorporating the present invention
- FIG. 2 is a cross-sectional view showing the front portion of the transfer case illustrated in FIG. 1;
- FIG. 3 is a cross-sectional view showing the rear portion of the transfer case illustrated in FIG. 1.
- FIG. 1 illustrates a four-wheel drive transfer case 10 utilizing a range shift friction plate synchronizer 20 and a four-wheel drive shift friction plate synchronizer 80 in accordance with the present invention.
- Transfer case 10 receives torque from a torque input shaft 12 which is coupled to a motor vehicle transmission and transmits torque to a drive shaft such as an intermediate drive shaft 14 through a planetary gear set 30 as is described more completely hereinbelow.
- a rear output shaft 16 is splined or otherwise connected to intermediate drive shaft 14 (or may be integrally connected with intermediate drive shaft 14) to receive torque therefrom and to transfer torque to the rear differential (not shown) of the vehicle.
- Transfer case 10 also includes a front output shaft 18 for receiving torque from intermediate drive shaft 14 and transmitting torque to the front differential (not shown) of the vehicle.
- input shaft 12 is rotatably supported at the forward end of the transfer case 10 by a bearing assembly 11 and incorporates a sun gear 31 which forms part of a planetary gear reduction assembly, generally indicated at 30, used to achieve the low gear or low speed operating range of the transfer case 10.
- the planetary gear assembly 30 also includes a ring gear 32 fixed relative to the housing H, and a plurality of planet gears 33 circumferentially spaced and individually rotatably supported by a planet carrier 34.
- the intermediate drive shaft 14 is rotatably supported within transfer case housing H and carries at its forward end 15 an axially moveable range shift sleeve 21 secured for rotation with shaft 14 by a splined connection.
- Range shift sleeve 21 has internal splines 22 to provide the splined connection with the external splines 17 of intermediate drive shaft 14, and to provide a driving connection with external teeth or splines 13 of input shaft 12 as will be discussed in more detail below.
- Shift sleeve 21 also includes external teeth or splines 23 for selective engagement with teeth 35 provided on planetary carrier 34.
- range shift sleeve 21 When range shift sleeve 21 is moved most axially rearward along the axis A--A as is partially shown with broken lines, external teeth 23 of shift sleeve 21 are engaged with teeth 35 of planet carrier 34 so that the planetary gear assembly 30 introduces a predetermined gear reduced torque to intermediate drive shaft 14 through sleeve 21 to provide the low speed range of the transfer case 10.
- this low speed torque When in two wheel drive mode, this low speed torque is transferred to the rear output shaft 16 through intermediate drive shaft 14.
- this reduced speed torque is also transferred from the intermediate drive shaft 14 to the front output shaft 18.
- Shift sleeve 21 may also be located at an axially intermediate or neutral position where it is coupled to neither the teeth 13 of input shaft 12 nor teeth 35 of planet carrier 34. In this neutral position, .the rotating input shaft 12 is unable to transfer torque to intermediate drive shaft 14.
- the driver of the vehicle can control the axial position of range shift sleeve 21 by mechanical means, electrical means or a combination thereof as is well known in the art to select the high, low, or neutral range of the transfer case 10.
- a range shift actuator 24 is used to selectively move range shift sleeve 21 between the various drive modes discussed above.
- One application of the present invention concerns the use of a specially designed preloaded friction plate synchronizer assembly shown generally at 20 to facilitate smooth engagement of the range shift sleeve 21 with torque input shaft 12 when the driver of the vehicle shifts the transfer case 10 into the high speed range, and to facilitate smooth engagement of teeth 23 of range shift sleeve 21 with the teeth 35 of planet carrier 34 when the driver of the vehicle selects the low speed range from neutral or from the high speed range.
- the torque converter of the vehicle if so equipped, causes input shaft 12 to continue to rotate for a period of time after the vehicle has been driven.
- range shift synchronizer 20 is designed to act as a brake to cause input shaft 12 and the components rotating therewith such as sun gear 31 and planet carrier 34 to smoothly slow down or stop (thereby eliminating torque converter drag).
- input shaft 12 and planet carrier 34 are substantially stationary allowing range shift sleeve 21 to be coupled to either shaft 12 or planet carrier 34 without ratcheting or clunking of the components.
- the preloaded friction plate synchronizer assembly 20 includes a first friction plate set defined and shown as at least one first or primary friction plate 40 splined or otherwise secured to sun gear 31 to rotate therewith.
- a second friction plate set is defined and shown as at least one second or secondary friction plate 42 maintained in frictional engagement with primary friction plates 40 by at least one spring 45 as is discussed in more detail below.
- the primary and secondary friction plates 40,42 are arranged coaxial to intermediate drive shaft 14 and each friction plate 40,42 includes an inner diameter 44 defining a central aperture capable of slidably receiving range shift sleeve 21 when sleeve 21 is moved axially to and from the various shift positions.
- Secondary friction plate 42 contains internal splines 43 to engage external splines 23 of range shift sleeve 21 (as is shown above the axis A--A in FIG. 2) when range shift sleeve 21 is moved axially forward from the low speed or neutral position.
- Range shift synchronizer 20 also facilitates smooth shifting from high speed range into the low speed range. While in the high speed range as is shown below the axis A--A in FIGS. 1 and 2, input shaft 12, plates 40,42, range shift sleeve 21, and intermediate drive shaft 14 all rotate at the same speed. When the vehicle is stopped to perform a range shift into low, range shift sleeve 21 is moved axially rearward such that internal splines 22 of sleeve 21 become disengaged from teeth 13 of input shaft 12.
- Input shaft 12 and the components coupled thereto will not begin to rotate at any appreciable speed due to torque converter drag because the drag will have been substantially eliminated by the action of the range shift synchronizer 20 when it substantially stopped the rotation of the input shaft 12.
- Further axially rearward movement of the non-rotating range shift sleeve 21 allows external splines 23 of sleeve 21 to engage the teeth 35 of the non-rotating or substantially non-rotating planet carrier 34 to place the transfer case 10 into the low speed range of operation.
- range shift sleeve 21 In the low speed range, unlike the high speed range, range shift sleeve 21 must not be connected with plate 42. This is due to the inherent difference in rotational speed between the sun gear 31 and the planet carrier 34.
- range shift synchronizer 20 functions as a brake to slow of stop a rotating component so that it may be coupled to a non-rotating component.
- synchronizer is meant to include a brake assembly as described, and those skilled in the art will recognize that slowing or stopping a rotating component to be coupled to a non-rotating component is merely a special case of synchronization.
- secondary plate 42 maintained in frictional engagement with primary plates 40 by at least one spring such as a plurality of circumferentially spaced apart coil springs 45 (only one shown) disposed in a circumferentially spaced apart relationship around the friction plates 40,42 to bias the friction plates between the springs 45 and a stop or reaction member 46.
- Each spring 45 is located in a recess 47 formed in the sun gear 31.
- 10 coil springs 45 may be used, each having a spring rate of 169.2 lb/inch, to provide a desired preloading force on the friction plate assembly 20.
- a second application of the present invention is shown generally at 80 in FIGS. 1 and 3 as a preloaded friction plate four-wheel drive shift synchronizer 80.
- the four-wheel drive friction plate synchronizer 80 facilitates shifting of the transfer case 10 between two-wheel and four-wheel drive modes of operation.
- four-wheel drive synchronizer 80 facilitates the so called "shift on the fly” procedure requiring the transfer case to be placed in four-wheel drive mode while the vehicle is being driven, and consequently while intermediate drive shaft 14 is rapidly rotating.
- a four-wheel drive shift sleeve 81 containing internal teeth or splines 82 and external teeth or splines 83 is coaxially disposed about and secured for rotation by a splined connection with intermediate drive shaft 14.
- Four-wheel drive shift sleeve 81 may be made of first and second sleeve members 81a, 81b coupled to rotate with each other by a splined connection allowing axial movement of pieces 81a, 81b relative to each other.
- the two-piece design may facilitate proper operation of the four-wheel drive shift synchronizer 80, although a properly configured one-piece sleeve 81 may be used.
- Four-wheel drive shift sleeve 81 is moveable along axis A--A between a forward position shown below the axis A--A and a rear position as shown above the axis A--A.
- the driver of the vehicle containing transfer case 10 can control the axial position of four-wheel drive shift sleeve 81 by mechanical means, electrical means, or a combination thereof.
- a four-wheel drive shift actuator 84 is used to selectively move four-wheel drive shift sleeve 81 as desired.
- Actuator 84 may be connected to a handle, lever, or other means to be controlled by the driver.
- a first drive sprocket 60 is coaxially and rotatably supported on a central portion of intermediate drive shaft 14 and is connected by a drive chain or belt 61 (FIG. 1) to drive a second drive sprocket 62 rotatably supported within transfer case 10.
- Second drive sprocket 62 is secured for rotation with front output shaft 18 by a splined connection or other means as is known in the art.
- First drive sprocket also contains external splines 63 to be drivingly coupled to internal splines 82 of four-wheel drive shift sleeve 81 as will be described more fully herein below.
- a first friction plate set is defined and shown as one or more first or primary four-wheel friction plates 70 coaxially mounted about intermediate drive shaft 14 and secured, preferably at their perimeter, by a splined connection to rotate with first drive sprocket 60.
- a second friction plate set is defined and shown as one or more second or secondary four-wheel drive friction plates 72 interleaved with and maintained in frictional engagement with primary friction plates 70 by at least one spring as is discussed in more detail below to "pre-load" the four-wheel drive shift synchronizer 80.
- Each friction plate 70,72 includes an inner diameter 74 defining a central aperture capable of slidably receiving four-wheel drive shift sleeve 81.
- Secondary four-wheel drive friction plates 72 contain internal splines 73 to engage external splines 83 of four-wheel drive shift sleeve 81 when four-wheel drive shift sleeve 81 is slid axially rearward as is shown above the axis A--A in FIGS. 1 and 3.
- Use of a two piece four-wheel drive shift sleeve 81 may provide an easier method of ensuring internal splines 82 of sleeve member 81a do not engage external teeth 63 of sprocket 60 until external splines 83 of sleeve member 81b are engaged with all secondary friction plates 72.
- Four-wheel drive shift synchronizer 80 may also help to provide a smooth on-the-fly shift of the transfer case 10 from four-wheel drive into two-wheel drive by gradually reducing the rotational speed of sprocket 60 as sleeve 81 is moved axially forward to become successively disengaged from plates 72.
- Primary four-wheel drive friction plates 70 and secondary four-wheel drive friction plates 72 are maintained in a preloaded frictionally engaged state by at least one spring which in the preferred embodiment illustrated is a Belleville type or disc spring 95 coaxially disposed about intermediate drive shaft 14.
- the torque capacity of four-wheel drive friction plate synchronizer 80 is defined by the equation set forth above in relation to the range shift synchronizer 20.
- a Belleville type disc spring 95 having a non-linear spring rate may be used to bias the friction plates 70,72 between spring 95 and a stop or reaction member 96.
- at least one coil spring may be used as is discussed above in relation to the range shift synchronizer 20.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
T=μ·(2/3)·p·n·((R.sup.3 -r.sup.3)/(R.sup.2 -r.sup.2))
Claims (17)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US08/400,708 US5613587A (en) | 1995-03-08 | 1995-03-08 | Transfer case friction plate synchronizer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/400,708 US5613587A (en) | 1995-03-08 | 1995-03-08 | Transfer case friction plate synchronizer |
Publications (1)
Publication Number | Publication Date |
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US5613587A true US5613587A (en) | 1997-03-25 |
Family
ID=23584693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US08/400,708 Expired - Lifetime US5613587A (en) | 1995-03-08 | 1995-03-08 | Transfer case friction plate synchronizer |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5720688A (en) * | 1996-02-13 | 1998-02-24 | New Venture Gear, Inc. | Full-time transfer case with synchronized dual planetary gear reduction unit |
US5911644A (en) * | 1997-12-15 | 1999-06-15 | New Venture Gear, Inc. | Two-speed transfer case with synchronized range shift mechanism |
US5921362A (en) * | 1995-02-28 | 1999-07-13 | Zf Friedrichshafen Ag | Synchronizing device with spring element applying constant force to a disc set for achieving the synchronization moment |
FR2831627A1 (en) * | 2001-10-30 | 2003-05-02 | Peugeot Citroen Automobiles Sa | Automobile gearbox comprises primary shaft and two secondary shafts and two synchronizers with dogging sleeves connected to translate together |
US6814682B2 (en) * | 2002-05-07 | 2004-11-09 | Borgwarner Inc. | Transfer case with synchronizer clutch |
US20050005723A1 (en) * | 2003-07-11 | 2005-01-13 | Christoph Pelchen | Reduction gear of a multi-range-gearbox for a vehicle |
EP1527937A2 (en) * | 2003-10-30 | 2005-05-04 | New Venture Gear, Inc. | Two-speed transfer case with adaptive clutch control |
US20070109030A1 (en) * | 2004-04-26 | 2007-05-17 | Samsung Electronics Co., Ltd. | Phase-Locked Loop Integrated Circuits Having Fast Phase Locking Characteristics |
US20110190092A1 (en) * | 2010-01-26 | 2011-08-04 | Getrag Corporation | Gear assembly for motor vehicle |
US20120096986A1 (en) * | 2010-10-26 | 2012-04-26 | Univance Corporation | Driving force distribution device |
DE10080426B3 (en) * | 1999-02-05 | 2014-03-20 | Mitsubishi Jidosha Kogyo K.K. | Drive state switching unit with synchronizing mechanism |
US20140187377A1 (en) * | 2012-12-28 | 2014-07-03 | Hyundai Wia Corporation | Range shift system for transfer case |
US20150246611A1 (en) * | 2011-03-09 | 2015-09-03 | Magna Powertrain Of America, Inc. | Transfer case with stationary low range planetary |
US9156351B2 (en) | 2012-06-13 | 2015-10-13 | Magna Powertrain, Inc. | Power transfer device with low effort mode shift system |
US9216649B2 (en) | 2012-06-13 | 2015-12-22 | Magna Powertrain Of America, Inc. | Power transfer mechanism for 4WD vehicles with low effort mode shift system |
JP2019014449A (en) * | 2017-07-10 | 2019-01-31 | トヨタ自動車株式会社 | Vehicular power transmission device |
US10359100B2 (en) * | 2016-10-19 | 2019-07-23 | Borgwarner Inc. | Transfer case for a drive train |
US11441612B1 (en) | 2021-05-07 | 2022-09-13 | Dana Heavy Vehicle Systems Group, Llc | Multi-speed electric powertrain with stepped splines that allow additional degrees of freedom |
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US4047602A (en) * | 1975-12-11 | 1977-09-13 | Dynetics, Inc. | Synchronizing coupling |
US4131185A (en) * | 1977-06-03 | 1978-12-26 | Dana Corporation | Friction clutch synchronizer with resilient gear coupling |
US4369671A (en) * | 1979-12-12 | 1983-01-25 | Aisin Warner Kabushiki Kaisha | Torque transfer mechanism with hydraulic control system for a four wheel drive vehicle |
US4422349A (en) * | 1979-11-26 | 1983-12-27 | Aisin Warner Kabushiki Kaisha | Torque transfer device for a four wheel drive vehicle |
US4649771A (en) * | 1985-08-26 | 1987-03-17 | Borg-Warner Corporation | Planetary gear drive with clutching assembly |
US4920828A (en) * | 1988-02-08 | 1990-05-01 | Mazda Motor Corporation | Planetary gear type transmission |
US5380255A (en) * | 1993-01-26 | 1995-01-10 | New Venture Gear, Inc. | Transfer case for part time front wheel drive in a four wheel drive motor vehicle |
-
1995
- 1995-03-08 US US08/400,708 patent/US5613587A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US4047602A (en) * | 1975-12-11 | 1977-09-13 | Dynetics, Inc. | Synchronizing coupling |
US4131185A (en) * | 1977-06-03 | 1978-12-26 | Dana Corporation | Friction clutch synchronizer with resilient gear coupling |
US4422349A (en) * | 1979-11-26 | 1983-12-27 | Aisin Warner Kabushiki Kaisha | Torque transfer device for a four wheel drive vehicle |
US4369671A (en) * | 1979-12-12 | 1983-01-25 | Aisin Warner Kabushiki Kaisha | Torque transfer mechanism with hydraulic control system for a four wheel drive vehicle |
US4649771A (en) * | 1985-08-26 | 1987-03-17 | Borg-Warner Corporation | Planetary gear drive with clutching assembly |
US4920828A (en) * | 1988-02-08 | 1990-05-01 | Mazda Motor Corporation | Planetary gear type transmission |
US5380255A (en) * | 1993-01-26 | 1995-01-10 | New Venture Gear, Inc. | Transfer case for part time front wheel drive in a four wheel drive motor vehicle |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5921362A (en) * | 1995-02-28 | 1999-07-13 | Zf Friedrichshafen Ag | Synchronizing device with spring element applying constant force to a disc set for achieving the synchronization moment |
US5720688A (en) * | 1996-02-13 | 1998-02-24 | New Venture Gear, Inc. | Full-time transfer case with synchronized dual planetary gear reduction unit |
US5911644A (en) * | 1997-12-15 | 1999-06-15 | New Venture Gear, Inc. | Two-speed transfer case with synchronized range shift mechanism |
DE10080426B3 (en) * | 1999-02-05 | 2014-03-20 | Mitsubishi Jidosha Kogyo K.K. | Drive state switching unit with synchronizing mechanism |
FR2831627A1 (en) * | 2001-10-30 | 2003-05-02 | Peugeot Citroen Automobiles Sa | Automobile gearbox comprises primary shaft and two secondary shafts and two synchronizers with dogging sleeves connected to translate together |
US6814682B2 (en) * | 2002-05-07 | 2004-11-09 | Borgwarner Inc. | Transfer case with synchronizer clutch |
US20050005723A1 (en) * | 2003-07-11 | 2005-01-13 | Christoph Pelchen | Reduction gear of a multi-range-gearbox for a vehicle |
EP1527937A2 (en) * | 2003-10-30 | 2005-05-04 | New Venture Gear, Inc. | Two-speed transfer case with adaptive clutch control |
EP1527937A3 (en) * | 2003-10-30 | 2006-06-07 | New Venture Gear, Inc. | Two-speed transfer case with adaptive clutch control |
US20070109030A1 (en) * | 2004-04-26 | 2007-05-17 | Samsung Electronics Co., Ltd. | Phase-Locked Loop Integrated Circuits Having Fast Phase Locking Characteristics |
US20110190092A1 (en) * | 2010-01-26 | 2011-08-04 | Getrag Corporation | Gear assembly for motor vehicle |
US9212728B2 (en) | 2010-01-26 | 2015-12-15 | GKN Driveline Newton, LLC | Gear assembly for motor vehicle |
US8790211B2 (en) | 2010-01-26 | 2014-07-29 | GKN Driveline Newton, LLC | Gear assembly for motor vehicle |
US8459149B2 (en) * | 2010-10-26 | 2013-06-11 | Univance Corporation | Driving force distribution device |
CN102452315A (en) * | 2010-10-26 | 2012-05-16 | 株式会社尤尼万斯 | Driving force distribution device |
US20120096986A1 (en) * | 2010-10-26 | 2012-04-26 | Univance Corporation | Driving force distribution device |
CN102452315B (en) * | 2010-10-26 | 2016-01-20 | 株式会社尤尼万斯 | Driving force distribution device |
US20150246611A1 (en) * | 2011-03-09 | 2015-09-03 | Magna Powertrain Of America, Inc. | Transfer case with stationary low range planetary |
US9630491B2 (en) * | 2011-03-09 | 2017-04-25 | Magna Powertrain, Inc. | Transfer case with stationary low range planetary |
US9156351B2 (en) | 2012-06-13 | 2015-10-13 | Magna Powertrain, Inc. | Power transfer device with low effort mode shift system |
US9216649B2 (en) | 2012-06-13 | 2015-12-22 | Magna Powertrain Of America, Inc. | Power transfer mechanism for 4WD vehicles with low effort mode shift system |
US20140187377A1 (en) * | 2012-12-28 | 2014-07-03 | Hyundai Wia Corporation | Range shift system for transfer case |
US9109664B2 (en) * | 2012-12-28 | 2015-08-18 | Hyundai Wia Corporation | Range shift system for transfer case |
US10359100B2 (en) * | 2016-10-19 | 2019-07-23 | Borgwarner Inc. | Transfer case for a drive train |
JP2019014449A (en) * | 2017-07-10 | 2019-01-31 | トヨタ自動車株式会社 | Vehicular power transmission device |
US11441612B1 (en) | 2021-05-07 | 2022-09-13 | Dana Heavy Vehicle Systems Group, Llc | Multi-speed electric powertrain with stepped splines that allow additional degrees of freedom |
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